profile.module is not working

Once you select some fields to include your profile the error goes away. It seems that the array is empty and thus the error. For example I get this error because I have no required fields, but once I require something, the error goes away.

warning: in_array(): Wrong datatype for second argument in /home/tracker/public_html/modules/profile.module on line 60 and a look at the code says that it is in reference to variable_get("profile_required_fields", array()); on line 51